Start > Run > msconfig > BOOT.INI Tab > Check the /SAFEBOOT box.
just wait until the first bios screen goes away, then hammer F8
If you cant get to the above because its broke hence why you want to get in it, when it starts loading windows, ie when you see the logo with the blue bar going from left to right underneath it, hit reboot then on your pc, when it restarts it will automatically ask you if you want safe made........just dont do that trick too often.